android源码程序：安卓闹钟

package com.cn.daming.deskclock; import android.app.AlarmManager; import android.app.NotificationManager; import android.app.PendingIntent; import android.content.ContentResolver; import android.content.ContentValues; import android.content.ContentUris; import android.content.Context; import android.content.Intent; import android.content.SharedPreferences; import android.database.Cursor; import android.net.Uri; import android.os.Parcel; import android.provider.Settings; import android.text.format.DateFormat; import android.util.Log; import java.util.Calendar; import java.text.DateFormatSymbols; /** * The Alarms provider supplies info about Alarm Clock settings * 核心类，对Clock设置提供支持信息 */ public class Alarms { // This action triggers the AlarmReceiver as well as the AlarmKlaxon. It // is a public action used in the manifest for receiving Alarm broadcasts // from the alarm manager. public static final String ALARM_ALERT_ACTION = "com.cn.daming.deskclock.ALARM_ALERT"; // A public action sent by AlarmKlaxon when the alarm has stopped sounding // for any reason (e.g. because it has been dismissed from AlarmAlertFullScreen, // or killed due to an incoming phone call, etc). public static final String ALARM_DONE_ACTION = "com.cn.daming.deskclock.ALARM_DONE"; // AlarmAlertFullScreen listens for this broadcast intent, so that other applications // can snooze the alarm (after ALARM_ALERT_ACTION and before ALARM_DONE_ACTION). public static final String ALARM_SNOOZE_ACTION = "com.cn.daming.deskclock.ALARM_SNOOZE"; // AlarmAlertFullScreen listens for this broadcast intent, so that other applications // can dismiss the alarm (after ALARM_ALERT_ACTION and before ALARM_DONE_ACTION). public static final String ALARM_DISMISS_ACTION = "com.cn.daming.deskclock.ALARM_DISMISS"; // This is a private action used by the AlarmKlaxon to update the UI to // show the alarm has been killed. public static final String ALARM_KILLED = "alarm_killed"; // Extra in the ALARM_KILLED intent to indicate to the user how long the // alarm played before being killed. public static final String ALARM_KILLED_TIMEOUT = "alarm_killed_timeout"; // This string is used to indicate a silent alarm in the db. public static final String ALARM_ALERT_SILENT = "silent"; // This intent is sent from the notification when the user cancels the // snooze alert. public static final String CANCEL_SNOOZE = "cancel_snooze"; // This string is used when passing an Alarm object through an intent. public static final String ALARM_INTENT_EXTRA = "intent.extra.alarm"; // This extra is the raw Alarm object data. It is used in the // AlarmManagerService to avoid a ClassNotFoundException when filling in // the Intent extras. public static final String ALARM_RAW_DATA = "intent.extra.alarm_raw"; // This string is used to identify the alarm id passed to SetAlarm from the // list of alarms. public static final String ALARM_ID = "alarm_id"; final static String PREF_SNOOZE_ID = "snooze_id"; final static String PREF_SNOOZE_TIME = "snooze_time"; private final static String DM12 = "E h:mm aa"; private final static String DM24 = "E k:mm"; private final static String M12 = "h:mm aa"; // Shared with DigitalClock final static String M24 = "kk:mm"; /** * Creates a new Alarm and fills in the given alarm's id. */ public static long addAlarm(Context context, Alarm alarm) { ContentValues values = createContentValues(alarm); Uri uri = context.getContentResolver().insert( Alarm.Columns.CONTENT_URI, values); alarm.id = (int) ContentUris.parseId(uri); long timeInMillis = calculateAlarm(alarm); if (alarm.enabled) { clearSnoozeIfNeeded(context, timeInMillis); } setNextAlert(context); return timeInMillis; } /** * Removes an existing Alarm. If this alarm is snoozing, disables * snooze. Sets next alert. */ public static void deleteAlarm(Context context, int alarmId) { if (alarmId == -1) return; ContentResolver contentResolver = context.getContentResolver(); /* If alarm is snoozing, lose it */ disableSnoozeAlert(context, alarmId); Uri uri = ContentUris.withAppendedId(Alarm.Columns.CONTENT_URI, alarmId); contentResolver.delete(uri, "", null); setNextAlert(context); } /** * Queries all alarms * @return cursor over all alarms */ public static Cursor getAlarmsCursor(ContentResolver contentResolver) { return contentResolver.query( Alarm.Columns.CONTENT_URI, Alarm.Columns.ALARM_QUERY_COLUMNS, null, null, Alarm.Columns.DEFAULT_SORT_ORDER); } // Private method to get a more limited set of alarms from the database. private static Cursor getFilteredAlarmsCursor( ContentResolver contentResolver) { return contentResolver.query(Alarm.Columns.CONTENT_URI, Alarm.Columns.ALARM_QUERY_COLUMNS, Alarm.Columns.WHERE_ENABLED, null, null); } private static ContentValues createContentValues(Alarm alarm) { ContentValues values = new ContentValues(8); // Set the alarm_time value if this alarm does not repeat. This will be // used later to disable expire alarms. long time = 0; if (!alarm.daysOfWeek.isRepeatSet()) { time = calculateAlarm(alarm); } values.put(Alarm.Columns.ENABLED, alarm.enabled ? 1 : 0); values.put(Alarm.Columns.HOUR, alarm.hour); values.put(Alarm.Columns.MINUTES, alarm.minutes); values.put(Alarm.Columns.ALARM_TIME, alarm.time); values.put(Alarm.Columns.DAYS_OF_WEEK, alarm.daysOfWeek.getCoded()); values.put(Alarm.Columns.VIBRATE, alarm.vibrate); values.put(Alarm.Columns.MESSAGE, alarm.label); // A null alert Uri indicates a silent alarm. values.put(Alarm.Columns.ALERT, alarm.alert == null ? ALARM_ALERT_SILENT : alarm.alert.toString()); return values; } private static void clearSnoozeIfNeeded(Context context, long alarmTime) { // If this alarm fires before the next snooze, clear the snooze to // enable this alarm. SharedPreferences prefs = context.getSharedPreferences(DeskClockMainActivity.PREFERENCES, 0); long snoozeTime = prefs.getLong(PREF_SNOOZE_TIME, 0); if (alarmTime < snoozeTime) { clearSnoozePreference(context, prefs); } } /** * Return an Alarm object representing the alarm id in the database. * Returns null if no alarm exists. */ public static Alarm getAlarm(ContentResolver contentResolver, int alarmId) { Cursor cursor = contentResolver.query( ContentUris.withAppendedId(Alarm.Columns.CONTENT_URI, alarmId), Alarm.Columns.ALARM_QUERY_COLUMNS, null, null, null); Alarm alarm = null; if (cursor != null) { if (cursor.moveToFirst()) { alarm = new Alarm(cursor); } cursor.close(); } return alarm; } /** * A convenience method to set an alarm in the Alarms * content provider. * @return Time when the alarm will fire. */ public static long setAlarm(Context context, Alarm alarm) { ContentValues values = createContentValues(alarm); ContentResolver resolver = context.getContentResolver(); resolver.update( ContentUris.withAppendedId(Alarm.Columns.CONTENT_URI, a